# Cambridge International AS Level Computer Science (9618): Section 2: Communication & Networking

> LANs, WANs, client-server and peer-to-peer architectures, network topologies (bus, star, mesh, hybrid), transmission media (twisted pair, fibre optic, wireless), hardware devices (NIC, WAP, router, switch), Ethernet CSMA/CD, IP addressing (IPv4, IPv6, subnetting), and DNS routing.

- **Track:** [Cambridge International AS Level Computer Science (9618)](https://csmasters.dev/tracks/as-level-9618.md) (CAMBRIDGE AS LEVEL 9618)
- **Module:** Section 2: Communication & Networking
- **Total Lessons:** 5
- **URL:** https://csmasters.dev/tracks/as-level-9618/course_modules/2-communication

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## Module Lessons

### Lesson 1: [2.1 LAN, WAN & Client Models](https://csmasters.dev/learn/as-level-9618/lan-wan-client-models.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/lan-wan-client-models

### Lesson 2: [2.2 Network Topologies & Cloud Infrastructure](https://csmasters.dev/learn/as-level-9618/topologies-and-cloud-computing.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/topologies-and-cloud-computing

### Lesson 3: [2.3 Transmission Media & Network Hardware](https://csmasters.dev/learn/as-level-9618/transmission-media-and-hardware.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/transmission-media-and-hardware

### Lesson 4: [2.4 Ethernet, CSMA/CD & Bit Streaming](https://csmasters.dev/learn/as-level-9618/ethernet-csma-cd-bit-streaming.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/ethernet-csma-cd-bit-streaming

### Lesson 5: [2.5 IP Addressing, Subnetting & DNS Resolution](https://csmasters.dev/learn/as-level-9618/ip-addressing-and-dns.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Open Theory (All-Access Practice)
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/ip-addressing-and-dns